1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72256ed88659983a596a0e3cd4c8b3177c7aa3a7e11fb8b32f524485b557c4ec. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97414aff-b666-49db-ac9b-b09f949e0206.json and https://artists.proofprofile.net/proofs/artist/97414aff-b666-49db-ac9b-b09f949e0206.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
NIAGARA TRIANGLE vol.2 40th Anniversary Edition
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954c0ba2415b72d569f6dc42a851dcae8ef696ce9c4d4163db9166d19c570457. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64b1f6b7be396bad2cab7286b387fa30f80df65971d163876b6cbade0cfffd9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b59e22fc403022f223e426bf430d05eb2ac61012fd23a38af268c66d42f2b87. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105672.
マンハッタンブリッヂにたたずんで
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ce7ee49c36229c59241793122e546278a7d52addb1983b49efb44aad492ef8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65a96bffc07cf18907caf0ca242b323090dc99d539add2c6d3accf8e8310cf2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4142413e93ab1c0583c88c9f31166298a01dceb00324eb2cc0feaa2080804c3b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeeb02841f05b5a63b6b59a9a7a22c3a33312cfcd83979a649bf37ffb1f960a1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717f2d54f7c6345ddc7c10c3d437bec0d64aa76b54934f985c8af00e5797f72b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9345fda50e60891c471a79a8c051dec69f304ffaf6fbd15cfb3283d26d6f5fd0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e48ecd4b31227fc4eca10f28f322b49eaa93701fde85aa4b5d5258646ff8525. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d17baf152f36a6ed8cc6ca47e748ba62f4edcfb65dc4ec5d226991251014038. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fe776f36b25347cf6f2128b84ed4dafa396ccc82e477ac7d84468c60326c8d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6314bc6e5d5e35bd54251030dfba33d7832de04611e755046b20bfd5a7e5fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c3d66bc2217b74305f94efe85bda87dd207c7e1306f54d4c96003641ed68ed. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59779ef8d45550bbcd9cdfdaa8978b71c349e6fff25030746adc141b53ed33b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c1ae7b14948f01af57320c5ae71194fba04b1e222ab1237edd1276cbfb13e6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e7d56341e1be29be435d79a447846d2324e9f82d60cfe415b7d7d4ff234157. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f118fada3670ef99169c615ef58c474f438b34500151db8cb85cf8be0da1f5d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61b4b72a23baa1cfe233f0789bd4ff2d979b623149254136c60e36e16a686ce. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e23221eb5e0351b8a708101b2827427d5bd884ff67be2f81dbbaf3566cc9a0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU902105685.